> There's no need to spell out all the special cases, also doing it this way
> makes it absolutely clear that we preclude unmergeable VMAs in general, and
> puts the other excluded flags in stark and clear contrast.
>
> Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@xxxxxxxxxx>
> Acked-by: David Hildenbrand <david@xxxxxxxxxx>
> Reviewed-by: Chengming Zhou <chengming.zhou@xxxxxxxxx>
> ---
> mm/ksm.c | 5 ++---
> 1 file changed, 2 insertions(+), 3 deletions(-)
>
> diff --git a/mm/ksm.c b/mm/ksm.c
> index 08d486f188ff..d0c763abd499 100644
> --- a/mm/ksm.c
> +++ b/mm/ksm.c
> @@ -679,9 +679,8 @@ static int break_ksm(struct vm_area_struct *vma, unsigned long addr, bool lock_v
>
> static bool ksm_compatible(const struct file *file, vm_flags_t vm_flags)
> {
> - if (vm_flags & (VM_SHARED | VM_MAYSHARE | VM_PFNMAP |
> - VM_IO | VM_DONTEXPAND | VM_HUGETLB |
> - VM_MIXEDMAP | VM_DROPPABLE))
> + if (vm_flags & (VM_SHARED | VM_MAYSHARE | VM_SPECIAL |
> + VM_HUGETLB | VM_DROPPABLE))
> return false; /* just ignore the advice */
>
> if (file_is_dax(file))
> --
> 2.49.0
Reviewed-by: Xu Xin <xu.xin16@xxxxxxxxxx>
